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_kikilalaaa
Post Patron
Post Patron

How to fetch array data from SharePoint List to Power Apps

Hi all. I have a sharepoint list with table as follow.

 

 

StudentMarks 1Difference
A80 
B90 
C50 

 

The details for Marks 1  are already in SharePoint List.

"Difference" are not stored in the SharePoint List as it differs according to user who log in the system.It is calculated such as follow.

Let say I loggoed in as student A, I will compare my difference with Student B and Student C.

The formula is (Marks 1(A)- Marks 1(B)) and (Marks 1(A)- Marks 1(C)). So the answer should be like this:

 

StudentMarks 1Difference
A800
B90-10
C5030

 

Students and Difference would be displayed in Gallery in PowerApps. 

 

My question is, how do I get all the data for marks and do the calculation for each student?

Thank you for your help!

2 ACCEPTED SOLUTIONS

Accepted Solutions
WarrenBelz
Most Valuable Professional
Most Valuable Professional

@_kikilalaaa ,

Firstly typing error (now corrected) - should be a colon rather than a comma after wMarks at the top. If you want both fields, you could do this

With(
   {
      wMarks:
      LookUp(
         YourSPList,
         Student=varUserName
      )
   },
   AddColumns(
      YourSPList,
      "Difference",
      wMarks.'Marks 1' - 'Marks 1',
      "Student B",
      wMarks.Student
   )
)

 

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View solution in original post

WarrenBelz
Most Valuable Professional
Most Valuable Professional

Hi @_kikilalaaa ,

Here is a similar exercise done with a computer price test list I have which shows the price difference on every other device to the top one.

ComparePrices.png

 

Please click Accept as solution if my post helped you solve your issue. This will help others find it more readily. It also closes the item. If the content was useful in other ways, please consider giving it Thumbs Up.

 

 

 

 

View solution in original post

8 REPLIES 8
WarrenBelz
Most Valuable Professional
Most Valuable Professional

Hi @_kikilalaaa ,

I assume you have your user's name in the Student field? If so, put this at App OnStart

Set(varUserName,User().FullName)

Then this would be the Items of the Gallery as you have displayed

With(
   {
      wMarks:
	  LookUp(
         YourSPList,
         Student=varUserName
      ).'Marks 1'
   },
   AddColumns(
      YourSPList,
      "Difference",
      wMarks - 'Marks 1'
   )
)   

 

Please click Accept as solution if my post helped you solve your issue. This will help others find it more readily. It also closes the item. If the content was useful in other ways, please consider giving it Thumbs Up.

_kikilalaaa
Post Patron
Post Patron

dear @WarrenBelz , 

thank you for helping.

Can you explain a bit on this code?

_kikilalaaa_0-1611509978231.png

What should be the output for this? Because I want to show the student's Name and Difference but from this coding, I think it only show the difference.

Student is the column name right? 

 

As for now, I still got error with the function "With". It says that it has invalid argument.

 

Thanks again!

WarrenBelz
Most Valuable Professional
Most Valuable Professional

@_kikilalaaa ,

Firstly typing error (now corrected) - should be a colon rather than a comma after wMarks at the top. If you want both fields, you could do this

With(
   {
      wMarks:
      LookUp(
         YourSPList,
         Student=varUserName
      )
   },
   AddColumns(
      YourSPList,
      "Difference",
      wMarks.'Marks 1' - 'Marks 1',
      "Student B",
      wMarks.Student
   )
)

 

Please click Accept as solution if my post helped you solve your issue. This will help others find it more readily. It also closes the item. If the content was useful in other ways, please consider giving it Thumbs Up.

Hi again. I have tried your code but I need some clarification.

 

1) Do I need to create "Difference" column first in the SPList?

2) Based on your code, you identified the other student. But actually I might have more than 1 student to compare. How do i declare that?

 

I am thinking of not storing the compatibility rate in the SPList, instead it will just store in the PowerApps lie a variable and being displayed to user. I'm thinking of using collection to store the answer for the formula but I do not know how to start. 

 

Looking forward for your help! Thank youuu

WarrenBelz
Most Valuable Professional
Most Valuable Professional

Hi @_kikilalaaa ,

Here is a similar exercise done with a computer price test list I have which shows the price difference on every other device to the top one.

ComparePrices.png

 

Please click Accept as solution if my post helped you solve your issue. This will help others find it more readily. It also closes the item. If the content was useful in other ways, please consider giving it Thumbs Up.

 

 

 

 

Hi @WarrenBelz ,

I did not get the "OtherDevice" part? Is it a column that you have already declared in the SPList, or new column that you have just declared? Can you elaborate more?

 

Thanks and stay safe!

WarrenBelz
Most Valuable Professional
Most Valuable Professional

@_kikilalaaa ,

It is a new column using AddColumns - you can call it whatever you like. It is simply the device selected in the gallery for display purposes in the second last column - you do not really need it if you have your TemplateFill set 

If(
   ThisItem.IsSelected,
   LightBlue,
   White
)

as you would then see what is being compared on both lines.

 

Please click Accept as solution if my post helped you solve your issue. This will help others find it more readily. It also closes the item. If the content was useful in other ways, please consider giving it Thumbs Up.

Thank you so much. It helps me a lot!😁

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